The purpose of this study is to determine if the Ascension PyroCarbon Radial Head is safe and effective in the treatment of arthritis, fractures, symptoms from radial head resections, and failed radial head implants.

Safety and Effectiveness Study of Ascension's PyroCarbon Radial Head Compared to Ascension's Metal Radial Head to Treat Arthritis, Fractures of the Radial Head, Relief of Symptoms After Radial Head Resection, or Revision of a Failed Radial Head Implant.

The proportion of patient successes with the Carbon Modular Radial Head at the 2-year evaluation is no lower than the proportion of patient successes with the Metal Radial Head (delta less than or equal to .06) [ Time Frame: 2-year evaluation ] [ Designated as safety issue: No ]

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Please refer to this study by its ClinicalTrials.gov identifier: NCT00825409